I am currently using the NMEA 0183 output on a Humminbird 989 into a RS232 to TTL converter to get depth data (sonarrange) into my Pixhawk.
This is the page I have followed - https://ardupilot.org/rover/docs/common-echologger-ect400.html
a. My SERIAL2_BAUD = 4800 - should it be ‘4’?
b. Is there any way to check if Telem2 is even seeing the data?
Unfortunately I still have no ‘sonarrange’